CA1206648A - Subscriber circuit for a telephone network - Google Patents

Subscriber circuit for a telephone network

Info

Publication number
CA1206648A
CA1206648A CA000440700A CA440700A CA1206648A CA 1206648 A CA1206648 A CA 1206648A CA 000440700 A CA000440700 A CA 000440700A CA 440700 A CA440700 A CA 440700A CA 1206648 A CA1206648 A CA 1206648A
Authority
CA
Canada
Prior art keywords
subscriber
transistor
current path
circuit
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000440700A
Other languages
English (en)
French (fr)
Inventor
Aloysius J. Nijman
Franciscus A.C.M. Schoofs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA1206648A publication Critical patent/CA1206648A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
CA000440700A 1982-11-12 1983-11-08 Subscriber circuit for a telephone network Expired CA1206648A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8204377 1982-11-12
NL8204377A NL8204377A (nl) 1982-11-12 1982-11-12 Abonneecircuit voor een telefoonnet.

Publications (1)

Publication Number Publication Date
CA1206648A true CA1206648A (en) 1986-06-24

Family

ID=19840578

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000440700A Expired CA1206648A (en) 1982-11-12 1983-11-08 Subscriber circuit for a telephone network

Country Status (8)

Country Link
US (1) US4608461A (da)
EP (1) EP0109705B1 (da)
JP (1) JPS59101955A (da)
AU (1) AU563742B2 (da)
CA (1) CA1206648A (da)
DE (1) DE3370737D1 (da)
DK (1) DK512583A (da)
NL (1) NL8204377A (da)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4551670A (en) * 1984-04-19 1985-11-05 At&T Bell Laboratories Circuit for maintaining the DC voltage on an electrically isolated telecommunication line at a reference level
US4679232A (en) * 1985-08-02 1987-07-07 American Telephone And Telegraph Company, At&T Bell Laboratories Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed
US7869179B2 (en) * 2007-03-14 2011-01-11 Panduit Corp. Protection patch panel

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223781A (en) * 1962-02-13 1965-12-14 Itt Constant voltage device
FR2254168A1 (en) * 1973-12-11 1975-07-04 Ass Ouvriers Instr Precision Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C.
FR2315811A1 (fr) * 1975-06-27 1977-01-21 Labo Cent Telecommunicat Dipole electronique pour le bouclage d'une ligne telephonique
GB1563802A (en) * 1975-11-10 1980-04-02 Post Office Electronic current feed circuit
FR2373927A1 (fr) * 1976-12-10 1978-07-07 Trt Telecom Radio Electr Reseau electrique destine a etre insere par une paire de bornes dans une boucle d'abonne telephonique
FR2382810A1 (fr) * 1977-03-02 1978-09-29 Labo Cent Telecommunicat Circuit d'alimentation de ligne telephonique avec protection
FR2403690A1 (fr) * 1977-09-14 1979-04-13 Labo Cent Telecommunicat Dipole gyrateur
US4272656A (en) * 1979-04-05 1981-06-09 Precision Monolithics, Inc. Quasi-resistive battery feed for telephone circuits
NL7903662A (nl) * 1979-05-10 1980-11-12 Philips Nv Lijncircuit.
NL7904159A (nl) * 1979-05-28 1980-12-02 Philips Nv Inrichting voor het toevoeren van signalen aan een telefoonlijn.
US4476351A (en) * 1982-03-25 1984-10-09 Rockwell International Corporation Subscriber loop current regulator
US4440979A (en) * 1982-05-03 1984-04-03 Gte Automatic Electric Incorporated Current sink for DPT channel unit
US4511763A (en) * 1982-11-01 1985-04-16 Gte Communication Systems Corporation Floating dc current source for a subscriber loop circuit

Also Published As

Publication number Publication date
JPS59101955A (ja) 1984-06-12
NL8204377A (nl) 1984-06-01
DK512583A (da) 1984-05-13
DK512583D0 (da) 1983-11-09
EP0109705A1 (en) 1984-05-30
EP0109705B1 (en) 1987-04-01
DE3370737D1 (en) 1987-05-07
US4608461A (en) 1986-08-26
AU2114483A (en) 1984-05-17
AU563742B2 (en) 1987-07-23

Similar Documents

Publication Publication Date Title
US3035122A (en) Constant current line circuitt for loop telephone lines
GB1602232A (en) Dc power supply
US4972106A (en) Binary-to-ternary converter for combining two binary signals
US4287436A (en) Electrical circuit for driving an inductive load
CA1206648A (en) Subscriber circuit for a telephone network
JPH0668709B2 (ja) 電圧安定化装置
US4935960A (en) Battery feed circuit
JPH0121703B2 (da)
US4626626A (en) Interface for a telephone set
US2907895A (en) Transistor trigger circuit
US3731012A (en) Current limiting and resistance monitoring circuit
SE452834B (sv) Transistoriserad likriktarbrygga for anslutning av en abonnenttelefon till en telefonledning
JP2004523151A (ja) 過電圧保護回路
US4564729A (en) Telephone illumination circuit
US3825848A (en) Integrated amplifier
US4163159A (en) Attenuation-free electronic switch
US4562525A (en) DC Power supply circuit for line interface circuits
US5745563A (en) Telephone subscriber line circuit, components and methods
US4306118A (en) Telephone set ringing current injection device
US4302636A (en) Subscriber's electronic line equipment comprising a two-wire-four-wire conversion circuit for a telephone exchange
US4096400A (en) Inductive load driving amplifier
US4580068A (en) Keyed low impedance voltage source
JPS6181062A (ja) 局線インタフエイス回路
US4800585A (en) Saturating bipolar switch circuit for telephone dial pulsing
JPH0787501B2 (ja) 電話用給電回路

Legal Events

Date Code Title Description
MKEX Expiry